Arsenic availability in rice from a mining area: Is amorphous iron oxide-bound arsenic a source or sink?

Liu, Chuanping; Yu, Huanyun; Liu, Chengshuai; Li, Fangbai; Xu, Xianghua; Wang, Qi

doi:10.1016/j.envpol.2015.01.025

Cited by 140 publications

(39 citation statements)

References 43 publications

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“…Arsenic uptake by rice plants mainly depends on the arsenic bioavailability rather than the total arsenic concentrations in soil [133] and binding of arsenic with Fe-(hydr)oxides in the soil reduce the arsenic mobility in soil solution [134] (Figure 1). Fe oxide can act as a sink for arsenic, therefore, increasing Fe oxide in soil leading to decrease in uptake and accumulation of arsenic in rice [135]. Fe supplementation helps to reduce arsenic induced oxidative stress in rice plants, as reported from the study of Nath et al [119].…”

Section: Role Of Fementioning

confidence: 71%

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Mitra¹,

et al. 2017

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According to recent reports, millions of people across the globe are suffering from arsenic (As) toxicity. Arsenic is present in different oxidative states in the environment and enters in the food chain through soil and water. In the agricultural field, irrigation with arsenic contaminated water, that is, having a higher level of arsenic contamination on the top soil, which may affects the quality of crop production. The major crop like rice (Oryza sativa L.) requires a considerable amount of water to complete its lifecycle. Rice plants potentially accumulate arsenic, particularly inorganic arsenic (iAs) from the field, in different body parts including grains. Different transporters have been reported in assisting the accumulation of arsenic in plant cells; for example, arsenate (As V ) is absorbed with the help of phosphate transporters, and arsenite (As III ) through nodulin 26-like intrinsic protein (NIP) by the silicon transport pathway and plasma membrane intrinsic protein aquaporins. Researchers and practitioners are trying their level best to mitigate the problem of As contamination in rice. However, the solution strategies vary considerably with various factors, such as cultural practices, soil, water, and environmental/economic conditions, etc. The contemporary work on rice to explain arsenic uptake, transport, and metabolism processes at rhizosphere, may help to formulate better plans. Common agronomical practices like rain water harvesting for crop irrigation, use of natural components that help in arsenic methylation, and biotechnological approaches may explore how to reduce arsenic uptake by food crops. This review will encompass the research advances and practical agronomic strategies on arsenic contamination in rice crop.

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Section: Role Of Fementioning

confidence: 71%

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Mitra¹,

et al. 2017

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“…Moreover, knowledge of the solid phases hosting the bioaccessible As can help envisage bioaccessibility changes with environmental conditions affecting the stability of the As hosting solid phases (e.g. the mobilisation of As associated to iron (Fe) redox cycling in flooded or paddy soils (Liu et al, 2015)). …”

Section: Introductionmentioning

confidence: 99%

Linking selective chemical extraction of iron oxyhydroxides to arsenic bioaccessibility in soil

Palumbo-Roe

Wragg

Cave

2015

Environmental Pollution

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The relationship between As bioaccessibility using the physiologically based extraction test (PBET) and As extracted by hydroxylamine hydrochloride (HH), targeting the dissolution of amorphous Fe oxyhydroxides, is established in soils from the British Geological Survey Geochemical Baseline Survey of SW England, UK, to represent low As background and high As mineralised/mined soils. The HH-extracted As was of the same order of magnitude as the As extracted in the bioaccessibility test and proved to be a better estimate of bioaccessible As than total As (bioaccessible As - total As: r = 0.955; bioaccessible As - HH-extracted As: r = 0.974; p-values = 0.000). These results provide a means of estimating soil As bioaccessibility on the basis of the HH extraction. Further selective extraction data, using hydrochloride acid that seeks to dissolve both amorphous and crystalline Fe oxyhydroxides, indicates a decrease in the As bioaccessible fraction with the increase of the soil Fe oxyhydroxide crystallinity.

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“…In R soil, As binding with fr 3 was 9%-37%, whereas in F soil, more than half 50%-80% of As was in the fr 3 fraction. Although more tightly bound to soil than fr 1 and fr 2, it is also seen as an MF that combines fr 1, fr 2, and fr 3, considering the mobility potential [34]. On the contrary, the sum of the fractions fr 4 and fr 5, which is relatively stable and difficult to lose in a short time, was 64%-88% and 10%-38% in the R soil and F soil, respectively.…”

Section: As Fraction In Soils Near the Mine Waste Duump And Dammentioning

confidence: 97%

“…Among the fractions, the sum of fr1 and fr2 is considered to be the mobile fraction [30][31][32]. Sometimes, fr3 fractions might be considered as a potentially bioavailable fractions, depending on the environmental conditions of the soil [33,34].…”

Section: Sequential and Single Extraction For Chemical Assessmentmentioning

confidence: 99%

“…The result of the analysis of the bound form of As through sequential extraction provided evidence supporting the assumption that As had been lost in the R area, whereas it was adsorbed and contaminated at the lower point, the F area. In 2019, 20 years after the dam was installed, the results of analysis showed that the MF (fr 1+ fr 2+ fr 3) of As in the R soil was low considering the mobility potential [34]. This was because the process of natural weathering had removed the fraction that was likely desorbed and dissociated from the soil.…”

Section: As Fraction In Soils Near the Mine Waste Duump And Dammentioning

confidence: 99%

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Assessment of Fraction and Mobility of Arsenic in Soil Near the Mine Waste Dam

Kim

Lee²,

Kim

2020

Sustainability

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Arsenic (As) contamination in abandoned mining areas has been of concern in Korea; hence, the reclamation and restoration of these areas must be conducted. Since large contaminated areas have not been restored yet, post management of restoration sites would be insufficient. The aim of this study was to monitor the pollution of environments near the waste dam in mining areas and to assess the fraction and mobility of As. Chemical assessment was conducted using sequential extraction and single extraction methods [Mehlich-3, 1N HCl, the simple bioavailability extraction test (SBET), and the synthetic precipitation leaching procedure (SPLP)], whereas biological assessment was conducted with a bok choy (Brassica campestris L. ssp. chinensis Jusl.) cultivation experiment. The results showed that the waste rock soil, forest soil, and sediments near the dam were contaminated with As. As a result of sequential extraction, most of the As in the soil of the upper part of the dam were observed to be tightly adsorbed (well-crystallized hydrous metal oxides and residual phases), whereas As in the forest soil of the lower part of the dam were observed to be relatively weakly bound (amorphous and poorly-crystallized hydrous metal oxides). These results show that As could be re-dissolved from secondary contaminated forest soil and spread to nearby environments. For the sustainable management of soil environment, an assessment of the fraction and mobility of As coupled with continuous monitoring are required.

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Arsenic availability in rice from a mining area: Is amorphous iron oxide-bound arsenic a source or sink?

Cited by 140 publications

References 43 publications

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Arsenic Accumulation in Rice and Probable Mitigation Approaches: A Review

Linking selective chemical extraction of iron oxyhydroxides to arsenic bioaccessibility in soil

Assessment of Fraction and Mobility of Arsenic in Soil Near the Mine Waste Dam

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